$$\int_2^2\frac{2x+13}{\sqrt{x^2+130}}dx$$

$$\frac{dy}{dx}=\frac{1+x}{y.x^2}$$

$$\frac{4x+6}{2x+3}$$

$$\lim_{x\to\infty}\left(\frac{\ln\left(x\right)^2}{\ln\left(x+1\right)^2}\right)$$

$$10+sin\left(x\right)=12y$$

$$\frac{x+y-2\sqrt{xy}}{x-y\:}$$

$$9y^2-49$$